Book Image

Kubernetes – An Enterprise Guide - Second Edition

By : Marc Boorshtein, Scott Surovich
Book Image

Kubernetes – An Enterprise Guide - Second Edition

By: Marc Boorshtein, Scott Surovich

Overview of this book

Kubernetes has taken the world by storm, becoming the standard infrastructure for DevOps teams to develop, test, and run applications. With significant updates in each chapter, this revised edition will help you acquire the knowledge and tools required to integrate Kubernetes clusters in an enterprise environment. The book introduces you to Docker and Kubernetes fundamentals, including a review of basic Kubernetes objects. You’ll get to grips with containerization and understand its core functionalities such as creating ephemeral multinode clusters using KinD. The book has replaced PodSecurityPolicies (PSP) with OPA/Gatekeeper for PSP-like enforcement. You’ll integrate your container into a cloud platform and tools including MetalLB, externalDNS, OpenID connect (OIDC), Open Policy Agent (OPA), Falco, and Velero. After learning to deploy your core cluster, you’ll learn how to deploy Istio and how to deploy both monolithic applications and microservices into your service mesh. Finally, you will discover how to deploy an entire GitOps platform to Kubernetes using continuous integration and continuous delivery (CI/CD).
Table of Contents (17 chapters)
15
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16
Index

Deploying GitLab

When building a GitOps pipeline, one of the most important components is a Git repository. GitLab has many components besides just Git, including a UI for navigating code, a web-based integrated development environment (IDE) for editing code, and a robust identity implementation to manage access to projects in a multi-tenant environment. This makes it a great solution for our platform since we can map our "roles" to GitLab groups.

In this section, we're going to deploy GitLab into our cluster and create two simple repositories that we'll use later when we deploy Tekton and ArgoCD. We'll focus on the automation steps when we revisit OpenUnison to automate our pipeline deployments.

GitLab deploys with a Helm chart. For this book, we built a custom values file to run a minimal install. While GitLab comes with features that are similar to ArgoCD and Tekton, we won't be using them. We also didn't want to worry about high availability...